Ejector for wells.



s. T. NELSON, EJECTOR FOR WELLS.

APPLICATION FVILED AUG.8, 19l3.

SVEN T. NELSON, F OAK PAR-K, ILLINOIS, ASSIGNOR, BY MESNE ASSIGNMENTS, TG SULLIVAN MACHINERY COMPANY, OF BOSTON, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

To all whom it may concern Be it known that I, SVEN T. NnLsoN, a citizen of the United States, and a resident of Oak Park, in .the county of Cook and.

e State of Illinois, have invented an Improvement in Ejectors for Wells, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representmg like parts.

more especially to that class of ejectors commonly called air lifts or water elevators, employed for the purpose of'utilizing pressure fluid, such as compressed air or steam, to create a suction in the water conduit, thereby to raise water from subterranean or other ,-reservoirs.

My invention will be best understood by reference to the following specification, when taken in connection with the accompanying drawings of two specific embodiments thereof, while the scope will be more particularly pointed out in the appended claims.

In the drawings: Figure 1 is a central, vertical` section of one form of air lift or water elevator embodying my invention; Fig. 2 is a sectional View on line 9.-2 of Fig. l; Fig. 3ds a central, vertical section of 30 another form of air lift or water elevator embodying my invention; and Fig. Il is `a sectional View on line 1 1 of Fig. 3.

Referring to the drawings and `to the cmbodiments of my invention which I have there disclosed for illustrative purposes, I have there' shown a so-called air lift or water elevator, comprising a liquid conduit designated generally by the numeral 5. This conduit comprises. av well-casing, herein having two pipes 6 and 7 threaded or otherwise appropriately secured into the upper and .lower ends respectively of a body, herein in the form of a casting, constituting what may be termed a head. This well-casing is inserted in an upright position, in the customarymanner, in the ground and water enters thereinto from the bottom. Thehead may be placed at such height in the well as circumstances require.

Referringr to the form shown in Figs. 1 and 2, I have there shown a pressure fluid conduit, designated generally by the nu'- -meral 8, including a pipe 9 which in practice will extend to the surface of the ground and M be connected to an appropriate source of Specification of Letters Patent.

This invention relates to ejectors, and` EJECIOR FOR WELLS.

Patented Aug'. 2-1, 1915.

Application led August 8, 1913. Serial No. 783,675.

is herein formed as a part of a casting 11 whose lbody portion is interposed between the upper and lower pipe sections 6 and v7 of the well-casing, and is provided 'with a laterally extending elbow into which the pressure fluid supply pipe 9 is threaded.

Herein the terminal portion of the conduit is supported in a central position by a plurality of webs Y12, between which are passages 13 permitting the flow of watervin an upward direction within the well-casing about the terminal portion 10.

The terminal portion 10 is provided with a large number of perforations 14C herein placed at ,different points longitudinally of the terminal portion and preferably'drilled thereinto obliquely so as to direct the streams of pressure fluid in an upward direction, thereby to furnish as great liftingl power as possible. l

In order that the number of perforations affording communication between the inlet of the pressure fluid conduit and the liquid conduit maybe varied I may provide any suitable means, but 'l'eieinthe perforated portion of the pressure fluid conduit constitutes a cylinder, within which a. piston 15 is mounted to slide longitudinally. This piston is provided with an upwardly extending piston rod 1G, guided in a plug 17 threaded vor otherwise suitably secured inA the upper end of the terminal port-ion 10. This piston rod is intended to extend to a convenient point at the surface of the ground, where it will be provided with appropriate means for moving the same vertically thereby to change the vertical position of the piston within its cylinder.

For convenience in manufacture, the casting-1l is herein provided with a central boss 1S, having an aperture 19 into which is threaded a plug 20. This aperture allows the core to be lsupported at both ends when the casting is being made, and it also permits the introduction of a boring bar used in machining the inside'of the perforatedv terminal portion.

When the yapparatus is placed in operaile tion the piston may be adjusted to suit the conditions under whichthe apparatus is operating. For example, assuming that the air pressure remains substantially constant, the output of the well can be varied by raising or lowering the piston, thereby varying the number of perforations affording communication between the inlet of the pressure fluid conduit and the liquid conduit. This is especially convenient where there are several wells operated by one air compressor, in which case the quantity of air supplied to each well can be varied while still maintaining the air pressure'substantially constant. By this means the volume of air can be gaged exactly to the output of the well.

It is found in practice that the best results are secured by maintaining the air pressure substantially constant and at the proper pressure in proportion to the depth of the well. By varying the position of the piston it is possible to determine the point at which the greatest efficiency of the well can be secured; that is to say, 1n experimenting with a well the piston isv placed .at .its

highest point, the output of the well is then measured, and the volume of air supplied to the well is also measured. The piston is then lowered and the volume of air supplied to the well is again measured' and the output of water also measured. These trials may continue until the most advantageous position is found with reference to the quantity of water raised and the volume of air used.

.In some cases the diameter of a well is so small that there is insufiicient space on the outside of the -well-casing for the pressure fluid conduit, and in such cases I prefer to employ the construction shown in Figs. 3 and 4. Referring to this construction, I have shown a pressure fluid conduit 21, placed centrally withinthe well-casing and having a terminal portion 22 provided with perforations 23 similar to those' described in connection with the rst form. Herein the upper portion of the pressure fluid conduit is in the form'of a pipe 24, threadedor otherwise appropriately secured in a plug 25, the latter in turn being threaded or otherwise suitably secured in the upper end of-the terminal portion 22. The upper end of the pipe 24 may be threaded into a fitting 2G having a gland 27 constituting a lguide for a piston rod 28 having secured to its lower end a piston 29 mounted to slide with in the terminal portion 22: The fitting 2G may be in the form of a T, having an inlet 30 for the pressure fluid, which will enter the cylinder through the-annular space between the piston rod and the pipe 24.

In this embodiment of my invention the terminal portion of the pressure fluid conduit is in the form of a casting 31 interposed between the upper and lower pipe sections of the wellcasing, and is provided with a plurality of webs 32 between which are passages 33 permitting the flow of water in an upward direction about the sides of the terminal portion of the pressure fluid conduit. i'

The operation of this form or embodiment of my invention is very similar to that of the form previously described, the eXception being that in the second form the pressure fluid enters at the top of the terminal portion and consequently the number of perforations affording communication between the pressure fluid conduit and the liquid conduit isincreased by lowering the piston, whereas in the first form the number is increased by raising the piston.

While I have herein shown and described twolforms or embodiments of my invention for illustrative purposes, and have disclosed and discussed in detail the construction and arrangement incidental to two specific applications thereof, it is to be understood that the invention is limited'neither to the mere details or relative arrangements of parts nor to its specific applications herein shown, but that extensive deviations from the illustrated forms or embodiments of the invention may be made without departing from the principles thereof.

Having thus described two embodiments of my invention, what I claim is:

1. An apparatus of the class described comprising, in combination, a liquid conduit, a pressure-fluid supply conduit having a terminal portion within the liquid conduit provided with a longitudinal series of perforations, and means for varying lthe number of such perforations affording comvmunication between the inletof the presmeans for varying the number of such perforations affording communication between the inlet of the pressure-fluid conduit and the liquid conduit by movement of said means longitudinally of and past succeeding perforations from end to end of said series.

3. A n apparatus of the class described comprising, in combination, a liquid conduit, a pressure-fluid supply conduit having a terminal portion within said liquid conduitprovided with a .plurality of perforations at different points longitudinally of the same, a piston mounted to slide longiva terminal, portion Within said liquid, conduit provided with a lplurality of perfora-H tions at different points longitudinally of the same, a piston mounted to slide longitudinally Within said terminal portion, and a piston rod guided by said pressue-fluidconduit at a point adjacent said terminal portion.

V6. An apparatus of theclass described comprising, in combination, a 'Well-casing 'including upper and lower pipe sections, an interposed device secured thereto and having a cylinder Within said Well-casing provided with a plurality of perforations, a

pressure-Huid supply pipe communicating with said cylinder, and a piston mounted to move longitudinally within ysaid cylinder` 7.' An apparatus of the class described comprising, in combination, a Well-casing including upper and lower pipe sections, an interposed device secured lhereto and having a cylinder supported by Webs Within said casing and provided with a plurality of perforations at different points in its length, a pressure-Huid supply pipe communicating with said cylinder, and to move longitudinally Within said cylinder. 8.y An apparatus of the class described comprising, in combination, the liquid conduit'5 comprising upper and lower sections 6 and 7, the pressure-fluid conduit 8 co1nprising the pipe 9 and casting l1 having the terminal portion l0 constituting a cylinder provided with the perforations 14, and the piston 15 and piston rod 16 mounted to slide in said cylinder.

` In testimony whereof, l have` signed my name to this specication, in the presence nfy two subscribing witnesses.

SVEN T. NELSON.

Witnesses:

E. A. GUnsTEN, F. C. PrIsTEn.

Gopie or this patent may be obtained for ve cents each, by addressing the Commissiener e2 meente, Washington, D. G.

a piston mounted 

